Allowance For Credit Losses (Age Analysis of Past Due Loans Receivables) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2011
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 59 Days Past Due	$ 3,015	$ 1,139
60 to 89 Days Past Due	178	54
Greater than 90 Days	6,669	4,851
Total Past Due	9,862	6,044
Current	397,343	397,640
Loans and Leases, Total	407,205	403,684	417,473
Loans Receivable >90 Days and Accruing	0	210
Residential mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 59 Days Past Due	516	692
60 to 89 Days Past Due	61
Greater than 90 Days	2,286	1,873
Total Past Due	2,863	2,565
Current	23,188	23,896
Loans and Leases, Total	26,051	26,461	28,887
Commercial mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 59 Days Past Due	2,489	257
Greater than 90 Days	322	2,324
Total Past Due	2,811	2,581
Current	240,572	229,716
Loans and Leases, Total	243,383	232,297
Loans Receivable >90 Days and Accruing		210
Commercial term [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
60 to 89 Days Past Due		54
Greater than 90 Days	86	200
Total Past Due	86	254
Current	78,611	76,048
Loans and Leases, Total	78,697	76,302
Commercial construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Greater than 90 Days	3,796	312
Total Past Due	3,796	312
Current	12,423	24,506
Loans and Leases, Total	16,219	24,818
Leases financing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
60 to 89 Days Past Due	2
Greater than 90 Days	60	61
Total Past Due	62	61
Current	39	130
Loans and Leases, Total	101	191	385
Consumer: Home equity [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 59 Days Past Due	10	175
60 to 89 Days Past Due	94
Greater than 90 Days	119	60
Total Past Due	223	235
Current	35,166	35,807
Loans and Leases, Total	35,389	36,042
Consumer: Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 59 Days Past Due		15
60 to 89 Days Past Due	21
Greater than 90 Days		21
Total Past Due	21	36
Current	7,344	7,537
Loans and Leases, Total	$ 7,365	$ 7,573